Improvement in bushes for mill-spindles



R. E. & F. A. HOWE.

Improvement ih Buvsh for Mill-Spindles, 8m.v

N0. 130,373. Patented Aug. 13,1872.

UNITED STATES PATENT OFFICE.

ROBERT E. IIowE AND ERANCIs A. IIOWE, OE soMoNAUx, ILLINOIS.

IMPROVEMENT IN BUSHES FOR MILL-SPINDLES, &c.

Specification forming part of Letters Patent No. 130,37 3, dated August 13, 1872.

"Bush7 or Box for Spindle or Flouring Mills and for other Upright Shafts; and we do hereby declare the following to be a full,

clear, and exact description of the same, which will enable any one skilled in the art to make and use the same, reference being had to the accompanying drawing forming part of this specification.

In the drawing aforesaid, Figure l represents a side elevation and half section on the line B b, Fig. 2. Fig. 2 is a plan ofthe same. Fig. 3 is a perspective view of one of the followers/7 as hereafter described.

Similar letters refer to the same parts in the different gures.

This invention relates to an improved bearing box or bush for the spindles of ouringmills and forvother upright shafts; and consists in constructing and arranging the several parts of the box or bush, so that each portion may be moved separately so as to compensate for any wear that may take place, and also that the parts may collectively be moved in a lateral direction for adjustment to the posi-A tion of the shaft or spindle. Also, in so arranging these several parts that they may be operated in a simple and convenient manner, and, at the same time, with a great degree of accuracy. Also, in arranging the whole in a compact form, within a suitable case, which shall effectually protect the parts from derangement and dust.

The construction and operation of this bush7 are as follows: A represents the case,

. which is cast with a hole through its center,

through which the shaft or spindle B is passed. At equal distances around this are three grooves, of proper width to receive the followers, or portions of the box, C C C. The backs of these grooves are inclined, as shown by the line d, Fig. l. In these grooves are tted the three followers C C C, one of which is shown in in Fig. 3, each of which has its face cut out in the form of a circle to flt the shaft, and faced with Babbitt metal or other suitable material. The back of the followers has the same inclination as the back of the grooves in which they are placed, as shown in Fig. 1. In the back of the fol. lower C is cast a slot, g, through which the adjusting-screws E E E pass, while the nuts D D D on said screw are held in the slot f. The upper end ofthe adjusting-screws E pass through the top-plate F, by which they are held in place, while a shoulder on the screw, resting on the under side of the plate, prevents its rising out of position when operated. Above the top-plate the screws are squared, to allow of their being turned by an ordinary wrench. It is evident from this arrangement of the parts that by turning the screw E the followers7 C C C may be raisedor lowered, and, consequently, by their moving on the inclined backs of the slots, they will move up to or recede from the shaft or spindle, thereby furnishing the means of adjustment for wear, &c. In the case A are cast three apartments, II H H, which serve as oil-reservoirs. These are filled with oil, and wicks passing through the slots lo k k furnish oil to the bearing, thus insuring perfect lubrication.

The top-plate F is firmly secured to the case by three bolts at G G G, and can be readily removed to refill the oil-reservoir when needed.

The advantages claimed for the bush are, that by the arran ement of the parts the adjustment of the ollowers is most easily accmplished..

In applying this bush to the spindles of flouring-mills it is bolted to or cast as a part of a plate under the lower stone,77 and the case A being somewhat smaller than the eye of the stone has no connection with it. In applying it to other upright shafts it is only necessary that the followers, oil-res` ervoirs, adjustingscrews, &c., should be arranged substantially as described, while the external shape may be to suit the position and conditions underwhich it is used.

Having thus described our invention, what weclaim as new, and desire to secure by Letters Patent, is-

.1. In combination with a mill-spindle and adjustingscrews E E E, the grooved und the followers C C C, nuts D D D, screws E E slotted followers C C C, and nuts D D D, as E, and top-plate F, all constructed as (1ea-nd for the purposes specified. scribed, and for the purposes specified.

2. The screws E E E, nuts D D D, and ROBERT E. HOWE. wedge-shaped followers G C C, in combination FRANCIS A.` HOVE. With the top-plate F and the spindle, as and fitnessesz for the purposes described. JAMES D. NEGUs,

3. In combination with any upright shaft, A. S. PERRIGO. 

